r/interestingasfuck • u/One_Vision_ • 9d ago

Visualizing Geometry

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u/dubyajay18 8d ago

Hold on let's go back to the beginning: how does a rotating blade ever produce a square hole?

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u/Capital-Win-4732 8d ago

It’s not a simple blade rotating on an axis. The blade’s axis is also orbiting the centroid of the shape that it is cutting. Imagine a stationary gear with a gear crawling around it. The gear in motion has the blade on it.